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Route · STS → PDX · 2020–2025 BTS data

Santa Rosa to Portland

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), STS to PDX (Santa Rosa to Portland) ranks #4344 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

86.1%
On-time
+7.1 pts
vs US avg
77 min
Delay when late
1,205
Flights
#4344 of 4927
Corpus placement

Cancelled

0.8%

Best Month

Sep 2025 95%

Worst Month

May 2025 82%

Distance

489 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 44 11 1 1 OO
Nov 2025 59 6 1 0 OO
Oct 2025 36 1 0 0 OO
Sep 2025 60 3 0 0 OO
Aug 2025 43 6 0 0 OO
Jul 2025 31 1 0 0 OO
Jun 2025 41 7 0 0 OO
May 2025 62 11 0 0 OO
Apr 2025 38 7 0 0 OO
Mar 2025 30 7 0 0 OO
Apr 2024 34 6 0 0 OO
Mar 2024 42 11 0 0 OO
Jan 2024 31 2 3 0 OO
May 2023 31 4 0 0 OO
Oct 2022 31 3 0 0 OO,QX
Sep 2022 30 9 0 0 OO
Aug 2022 31 3 0 0 OO
Jul 2022 31 1 0 0 OO
Jun 2022 30 7 0 0 OO,QX
May 2022 31 2 0 0 QX
Apr 2022 30 1 0 0 OO,QX
Mar 2022 31 6 0 0 OO,QX
Jan 2022 32 4 2 0 OO,QX
Dec 2021 33 17 0 0 OO,QX

STS–PDX seasonal on-time pattern

Best: July (96.8%) · weakest: December (74.1%)

70%75%80%85%90%95%100% JanMarAprMayJunJulAugSepOctNovDec 74.1%

Strongest calendar month

July

96.8% on-time · ~31 flights/mo

Busiest calendar month

November

~52 flights/mo avg

Weakest calendar month

December

74.1% on-time · ~36 flights/mo

Cancellation Rate

0.8%

7 of 892 flights

Diversion Rate

0.1%

1 of 892 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

STS - Santa Rosa

Full on-time, delay-cause, and seasonal performance for Santa Rosa, CA.

STS on-time profile

PDX - Portland

Full on-time, delay-cause, and seasonal performance for Portland, OR.

PDX on-time profile

Compare the two airports

See STS and PDX side by side on delays, cancellations, and reliability.

Compare STS vs PDX

Origin-hub reliability standing

Among STS's stronger departures

STS → PDX posts a 86.1% on-time rate, landing in the ≥85% band with 1 of 8 BTS-tracked routes leaving Santa Rosa. The same hub also shows 7 mid-band and 0 challenged departures · fleet-wide on-time rank #892 of 4927 (highest on-time = #1).

What the Data Says About STS to PDX

Santa Rosa to Portland (STS to PDX) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 86.1% on-time rate across 1,205 flights, with delays that do happen averaging 77.1 minutes. The corridor runs roughly 489 miles and is served by 3 carriers. Over the most recent 24 months, 7 of 892 flights were cancelled (0.8%) and 1 diverted (0.1%).

Monthly performance varies moderately here: Sep 2025 was the strongest month at 95% on-time versus May 2025 at 82%, a 13-point difference.

On the multi-year calendar, STS–PDX peaks in July at 96.8% on-time while November carries the heaviest traffic (~52 flights per month) ; the softest month is December at 74.1%, a 22.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does STS to PDX rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, STS to PDX ranks #4344 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from STS to PDX? ▼
Flights from Santa Rosa to Portland have a 86.1% on-time rate based on 1,205 flights. The average delay is 77.1 minutes. The best recent month was Sep 2025 with 95% on-time.
What is the cancellation rate for STS to PDX? ▼
Over the last 24 months, 0.8% of flights on this route were cancelled (7 of 892 flights) and 0.1% were diverted.
How far is the flight from STS to PDX? ▼
The flight distance from Santa Rosa (STS) to Portland (PDX) is approximately 489 miles. This route is served by 3 carriers.
When is the best time to fly from STS to PDX? ▼
The best recent month for on-time performance was Sep 2025 (95% on-time). The worst was May 2025 (82% on-time). Consider booking during months with historically better performance.

Airports on this route

STS Airport

Santa Rosa
PDX Airport

Portland
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using STS–PDX data

STS–PDX runs 7.1 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare STS and PDX airport profiles: delay causes and top routes differ even on the same corridor. STS airport
  • If your dates flex, July (96.8% on-time) beats December (74.1%) on this corridor. Seasonal chart
  • 4 other routes post a similar 86.1% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.